Class TriggerZone

Non-physical collision area with enter/stay/exit lifecycle. Does not apply forces — purely detection-based.

Usage:

const zone = new TriggerZone({
  x: 100, y: 200, width: 64, height: 64, shape: 'aabb',
  filterTags: ['player'],
});
zone.onEnter(entity => console.log('entered'));
zone.onExit(entity => console.log('exited'));
zone.update(registry); // call each frame
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